2.5L Fuel Injection -- direct injection or port injection?

[Skyline]

I new about carbon build up but the suit was new to me. Wow seems like early oil changes needed on direct inject engines. I always laugh at people who wait till 10K miles, now it seems like back to 3K for oi9l changes. . Glad I have a hybrid coming. No dumb direct injection. The video had all negatives so the positive MUST be better mpg? Doesn't seem like it would be but it must or why do it..

I didn't know anything about GDFI EB 2.0L engines prior to getting my Lariat, other than it comes with it. Had I know what I know now, I would not have a Maverick, but that's on me for not researching the subject. With that stated....

Changing the oil once a year with Mobile-1 after driving 3 - 4K miles, like I do, helps. On the other hand, mainly city traffic pretty much offsets that compensating measure. Based on my 5 month experience with the Lariat engine, it isn't a better mileage either. At least I would not call 17-19 mpg better mileage nowadays; better than what? Yes, better than my 25 years old F150, but that's rather low bar....

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[MakinDoForNow]

"PORT"

The 2.5l Atkinson is sequential multiport fuel injection (SMFI) where fuel is pumped under pressure through a small nozzle into various points in the engine's air intake section, and the atomized fuel then enters the engine cylinders past intake valves where it burns during the combustion cycle.

Read this and think. I read somewhere maybe manual l that in some conditions such as low coolant levels resulting in higher heat levels the 2.5L will run on fewer cylinders to help control the heat.

 

[cyberdog]

Don't forget DI sounds more like a diesel, especially on a cold start in winter. My wife's Crosstrek is DI, and there's absolutely a different when outside the vehicle. one of the downsides to a boxer engine, the valve covers sit just inside the plastic fender wells, so the engine is very audible standing beside the vehicle. (The other downside is plug replacement sucks, having had to do my Outback's 6 cyl last October, while waiting for the Maverick to arrive, other than that great engine...a real knuckle buster if you have large hands).

 

[TheSEARCH]

Don't forget DI sounds more like a diesel, especially on a cold start in winter. My wife's Crosstrek is DI, and there's absolutely a different when outside the vehicle. one of the downsides to a boxer engine, the valve covers sit just inside the plastic fender wells, so the engine is very audible standing beside the vehicle. (The other downside is plug replacement sucks, having had to do my Outback's 6 cyl last October, while waiting for the Maverick to arrive, other than that great engine...a real knuckle buster if you have large hands).

I watched a youtube video on a toyota that has both and you could here it go from the much louder Direct to port, I became much quieter. The more I learn about direct the more I dislike it. Another video showed why sute builds up in the oil much faster. It must improve gas mileage or why do it.

 

[Skyline]

I watched a youtube video on a toyota that has both and you could here it go from the much louder Direct to port, I became much quieter. The more I learn about direct the more I dislike it. Another video showed why sute builds up in the oil much faster. It must improve gas mileage or why do it.

Every ICE engine has soot build up in the oil due to the piston blow by, that can be countered by frequent/quality oil change among other things. This soot buildup in the oil mostly harmless to the engine, except for the timing chain:



The soot going out in the tail pipe is good, wearing out the timing chain is not so much...

As for better mileage with the DI, all bets are off in city traffic and/or the turbo kicking in...

 

[TheSEARCH]

Every ICE engine has soot build up in the oil due to the piston blow by, that can be countered by frequent/quality oil change among other things. This soot buildup in the oil mostly harmless to the engine, except for the timing chain:



The soot going out in the tail pipe is good, wearing out the timing chain is not so much...

As for better mileage with the DI, all bets are off in city traffic and/or the turbo kicking in...

Pretty sure a timing chain fail can destroy an entire engine. Valve to piston contact. After seeing that video you posted I sure would change my oil more often with a direct injection engine. Good thing i have a hybrid coming. As I said the more I see about direct injection the more I dislike it.

 

[Skyline]

Pretty sure a timing chain fail can destroy an entire engine. Valve to piston contact. After seeing that video you posted I sure would change my oil more often with a direct injection engine. Good thing i have a hybrid coming. As I said the more I see about direct injection the more I dislike it.

The chances are that the timing chain would be replaced prior to valve to piston contact, due to the engine rough idling, sluggish performance, misfiring, etc. At least in most cases where people care somewhat about their vehicle. If not, oh well...

The EB 2.5L for the hybrid does have both, port and direct injection (PFDI); the PF and the DI is not used together, it's either or. The direct injection used at higher RPMs, especially when the the turbo kicks in. Conversely, the port injection is used at lower RPM where there's no need for more power output. As such, the EB 2.5L also suspect to carbon buildup, including the timing chain and the intake valves, it just takes longer time.

Update: My mistake, the Maverick engine has Sequential Multiport Fuel Injection, or SMFI and not PFDI, sorry guys...

 

[billbillw]

The chances are that the timing chain would be replaced prior to valve to piston contact, due to the engine rough idling, sluggish performance, misfiring, etc. At least in most cases where people care somewhat about their vehicle. If not, oh well...

The EB 2.5L for the hybrid does have both, port and direct injection (PFDI); the PF and the DI is not used together, it's either or. The direct injection used at higher RPMs, especially when the the turbo kicks in. Conversely, the port injection is used at lower RPM where there's no need for more power output. As such, the EB 2.5L also suspect to carbon buildup, including the timing chain and the intake valves, it just takes longer time.

While changing the oil more often will delay the the timing chain issues, it does nothing for the carbon buildup on the intake valves for the 2.0/2.5 engines. For that, one would need oil catch can (OCC) for both the upper and the lower side.

Knowing how the engine works and its shortcomings can help one to mitigate/delay the issues showing up. Should this be Ford's responsibility instead of the owner? That's up for debate and depends who you ask....

What are you talking about? The hybid 2.5L does not have DI, period. It is port injected only. Also, the hybrid is not an EB motor. It does not have a turbo.

 

[LSchicago]

Most Toyotas are port and direct injected. It will run on DI, and use port to keep the valves clean.

My Mustang is the opposite. It runs on Port injection to keep everything clean, and kicks in direct injection under full throttle allowing the 12:1 engine to run good even on 87 octane. Mine also has 15# of Boost from the Supercharger allowing it to make 1,000+ HP on a stock engine. (just supercharger and fuel pump system added) It just runs E85 only at that power level. Dual injection is awesome for boost.

 

[GPSMan]

The chances are that the timing chain would be replaced prior to valve to piston contact, due to the engine rough idling, sluggish performance, misfiring, etc. At least in most cases where people care somewhat about their vehicle. If not, oh well...

The EB 2.5L for the hybrid does have both, port and direct injection (PFDI); the PF and the DI is not used together, it's either or. The direct injection used at higher RPMs, especially when the the turbo kicks in. Conversely, the port injection is used at lower RPM where there's no need for more power output. As such, the EB 2.5L also suspect to carbon buildup, including the timing chain and the intake valves, it just takes longer time.

While changing the oil more often will delay the the timing chain issues, it does nothing for the carbon buildup on the intake valves for the 2.0/2.5 engines. For that, one would need oil catch can (OCC) for both the upper and the lower side.

Knowing how the engine works and its shortcomings can help one to mitigate/delay the issues showing up. Should this be Ford's responsibility instead of the owner? That's up for debate and depends who you ask....

^^^Can you / will you correct the errors in this posting?^^^

 

[TheSEARCH]

What are you talking about? The hybid 2.5L does not have DI, period. It is port injected only. Also, the hybrid is not an EB motor. It does not have a turbo.

All correct. No idea why he thinks the 2.5 hybrid engine has both or a turbo,. I will assume a mistake . I sure make them.

 

[Skyline]

All correct. No idea why he thinks the 2.5 hybrid engine has both or a turbo,. I will assume a mistake . I sure make them.

It was a mistake, sorry about that and the post had been updated...

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